Adding-machine.



vPAIEWIED DEC. 3l. 1907. W. F. GATEWOOD. Y

Amm@ MAGHNE.

APELIGATIGN FILED JUNE1G.1906.

9 SHEETS-SHEET l.

if# gw/ PATENTBD 9136.31, 19o?. F. GATBWQOD. 4ADDING MACHINE.

APPLICATION .FILED JUNE 18. 1906.

9 SHEETSTSHEBT 2.

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. 5ml. ...nu -1 mw NY o , PATENTEDDEC. s1, 1907. W. E. @Ammon ADDINGmem-NB. APPLIGATION FILED JUNE 18. 1.906.

9 SHEETS--SHEET 3.

No. 875,423. PATBNTED DEC. 8l, 'i907 W. F. 'GATEWDOD ADDING MACHINE.

APPJIGATION FILED JUNE 18.1906.

- QSHEETS-SHEBT LL i PATENTED 1350.31, 1907. E. GATBWGD. ADDKNG MAGHNE,MBELI'UYMION FILED JUNE 18. 1905.

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PATENTED DEU. 3l, V1.907.

W.' l?. GATEWUUD.

ADDING MACHINE.

APPMGATIONPILBD JUNI:1B,19O6.

' Qs-HBETVSHBET i 'PATENTES DEG, 3l GATEWGGD. ANG MACHINE.

APPLICATION FILED JUNE 1a, 1906. l

s SHEETS-SHEET 7.

ATENTED DE@ 3L www MMI-1mg APPLICATION FILED .TUNE 18. 1906.

49 SHEETS- TEET 8.

'EMMT UNITED STATES PATENT OFFICE.

WILLIAM F. GA I`E WOOD, OF IPIERCE CITY, MISSOURI, ASSIGNOR OF ONE-THIRDTO ETHELBRT LAMPKIN, OF ST. LOUIS, MISSOURI, AND WILLIAM W. LOOKE, OF

Pinnen ci'TY7 Missouri-i.

To all wt/im it may concern.-

in AddingfMachincs, of which the following.

is a full, clear, and exact description, reference beingr had to theaccompanying drawings, forming part of this specification.'

llIy'inventionrela-tes to that class of adding machines havin)rmechanism lor performing addition an also having printing,r mechanismfor recording the result of the operation of the adding mechanism.

The printing mechanism for recording is described, shown and claimed inanother application filed February 4, 1907, Serial l\umber 355,618.

The invention has for its object to produce a simple machine of thischaracter which has the elliciency of many other eX.- pensive and'verycomplicated machines of the saine type, but which is much less expensiveto manufacture and much less liable to become impaired dueto itssimplicity.

Figure I is a top or plan View of my adding machine withthe guide postsby which the actuating racks of the item wheels, accumulator wheels andty e wheels are operated shown "n horizonte. section. Fig. II is a sideelevation of the machine. Fig. III is a side elevation looking;` at thereverse side of the machine from that shown in Fig- Il. FigLIV is a viewartly in longitudinal section taken througli the machine and iartly inelevation. Fig. V is an inverted] plan View ofthe machine. F ig. VI is afront elevation of the machine with a portion of the ke .plate shown invertical section. Fig.

V I is a top or plan View of the l'oiwvard portion of the base of themachine and the shift mechanism for actuating the .sweep tliroupjh themedium of which the rach bars are operated, the slide bar formingr apart 'of this mechanism being partly omitted. Fig'. VIII is a verticalcross section taken on line VIIIA VIII, Fig. VII. Fig. IX is a top orplan View of the forward portion of the base of the machine with theshifting mechanism omitted. Fig. X is a longitudinal section takenonline X--X, Fig. VII. Fig. XI is in part a top or plan view of themachine with the rack bars, their guide posts and. the rackSpecification of Letters Patent.

Application filed June I8. IQU. Serial No. 322.138.

f machine.

Annina-MACHINE.

. Patented Dec. 31, 1907.

bar 'controlling members shown in horizontal section. Fig. XII is anenlarged view partly in longitudinal section and partly in eleva-` tiontaken through the central portion of the Fig. XIII is a view partly inplan and partly in horizontal section taken on line XIIIe-XI-II, Fig.XII. Fig. XIV is an en larger] View partly in elevation and partly intransverse section of the middle part of the machine takenr on lineXIV-XIV, F ig. I. Figs. XV to XVIII inclusive are diagram* matical views`illustrating the various ositions of therach bar operatingl sweep olthe machine while at rest and during its operation. Fig. XIX is anenlarged-view partly iii plan and partly in horizontal section taken online XIXXIX, Fig'. XX, of the ink ribbon feedingr mechanism. Fig. XX isa side elevation of the parts shown in Fig. XIX. Fig". XXI is atransverse section of the forward end. of the machine taken on lineXXI--XXI, Fig. I with the stop mechanism that controls the main releaselever of the machine shown in elevation.

l designates the hollow base of the machine which is provided with asurrounding bottom flange 2 that at its -forward. end contains verticalslots 3 and 4 (see Figs. IV and VI), which 'provide ioi the operation ofcertain levers to be hereinafter described.

5 is a slot extending transversely of the base near its forward end (seeFigs. IV, V,

VII and IX) and adj acont to said slot and in lines extendingtransversely of the base are vertical stop pins 6, (see also .F VIII andX) and a depression 6 as seen in Figs.VII, IX, and X. Near the rear endof the base is a transverse slot 7 (see Figs. IV, V, XI and XII).

8 designates short posts (see F igs. II, III, IV, V, and XII) which arearranged in aliningpairs and secured to the under side of the base-1. atits rear portion and extending upwardly thei'cthrougl'i, as seen mostclearly in F ies. V and XII. These posts have journaIed to them loweranti-friction rollers 9 and upper anti-'friction rollers 10 arranged inpairs and se applied to the posts that they will rotate in a directionlongitndinall yof thebase of the machine. The lower ro lers i) serve assupports for, and both the lower rollers 9 and the upper rollers l() ineach pair, act as guides for a reciprocatory carriage by which the itemand type wheels of.

-arated condition.

T he base bar 15 is provided with rearwardly extending arms 16 (seeFigs. ll., lV, Xl and XH), that operate between the rearmost pairs ofanti-friction lower rollers Qand upper rollers 10 while the ends ofsaid. base bar projecting beyond the side bars of the carriage operatebetween the forward pairs of said anti-friction rollers. v17 are guideposts also secured to the base bar 15 of the carriage and provided withvertical slots 18 extending downwardly from their upper ends. The slots`18 serve to receive a member to be hereinafter described, and they alsoreceive the spacing rod 13 which is notched at proper intervals in orderthat smaller portions of the rod 'may enter into said slots while thelarger intervemnnr portions of the rod serve to'space and hold the guideposts in sep- Each guide post has fxed to it a stud 19 that ispreferably equipped with an anti-friction roller 20 (see Fie. IV). Thecarriage side bars 11 are provided with forwardly extending horizontalarms 21 and rearwardly extending horizon-v tal arms 22.

23 are item wheels, each of which bears upon its periphery the numerals1 to 9 and the l 0 sign. Atthe side of each item wheel ar'e pins 24corresponding in number to the number of characters upon the peripheryof the wheel. The entire series of item wheels, of which there may beany number, is loosely moiuited upon a supporting shaft mounted in theforward horizontal arms 21.

26 are type wheels f a number corresponding to the number of item wheelsand each of which bears at its periphery type characters correspondingto those borne by said item wheels. The type wheels are supported inalinement with the item wheels but are spaced apart therefrom and theentire series of type wheels is loosely mounted upon a supporting shaft27 mounted in the rear horizontal arms 22. At the side of each typewheel are pins 2S correspondiiig in number to the number of characterson the wheel and adapted to receive the engagement of the same membersthat operate the item wheels by engaging their pins, whereby the itemwheels and type wheels are caused to be operated in unison, as willhereinafter appear.

29 designates drop or gravitative rack bars 'corresponding in number tothe number of item wheels and type wheels and each-of which is rovidedat its forward edge with rack teet 30 'adapted to engage'the item itsguide post 17 and on which is an antifriction roller 34 (see' Fig. XII).Each rack bar is provided with a slot 85 `(see Figs. 1V and X11)extending upwardly from its lower end and which receives the guide stud19 of the ycorresponding guide ost`17 for the pur.- pose of providingfor t e guidance of the lower end of the rack bar. The side of each.rack bar is preferably recessed as seen at 36 Fig. IV, to accommodatethe anti-friction roller 20. In each rack bar near its lower end and atits forward edge is a notch 37 that receives amember (66) by which the.rack bar is lifted to cause it to actu'ate the item wheels and typewheels. l

38 designates a segmental or curved ratchet bar (see Figs. I, lV, XI XH.and XIV) mounted in a fixed position upon the base 1 of the machine at apoint in front of thc rack bars 29 and the carriage by which lthey aresupported. The ratchet bar is provided with a number of vertical teethcorresponding to the number of rack bars. l

4() designates a sweep arm that is arranged l to swing longitudinally ofthe ratchet bar 38 and which is provided with a notch 41-`in its underedge (see Fig. IV) to receive .theteeth ol .said ratchet bar when saidsweep arm 1s in a lowered position. The sweep arm is pivoted to abifurcated head42 of a rock shaft 43, thereby providing for vertical,fas

well as .swinging movement of said j sweep arm. The rock shaft 48 isjournaled in a bracket 44 surmounting the base ofthema chine and itextends downwardly through said base. f

45 is a torsion spring attached at one end to said rock shaft and fixedat its other end i to the base 1. rotate the rock shaft 43 in Aadirection toward the units side of the machine.

46 is a lever fixed. to the lower end of th rock shaft 43 beneath thebase 1 and by which said. roel; shaft is rotated to shift the. sweep arm40 away from the units side yof the machine, in order that said sweeparm may be carried into juxtaposition with anyv desired rack bar 29;

47 designates a spacing platethat is slidably mounted upon the base ofthe machine at the location of the transverse slot 5 and the stop pins6. This spacing plate is adapted to be moved 'transversely of the'machine and it is directed in its movement by guides 48. Extendingdownwardly from the lower side of the spacing plate is alleg 49 Thistorsion spring acts' to vtig?! which operates inthe slot 5, as seen inFigs. IV, V and V Il, and which is adapted to engage the forward end ofthe lever 46 for the purpose of shifting said lever, rotating the rockshait 43, and swinging the sweep'arm 40.

50 is a return spring connecting the spacing plate leg 49 to the hase ofthe machine by which said spacing plate and leg are returned to theirnormal positions.

l 51 designates spacer buttons carried by the spacing plate 47 and whichbear the various characters indicating integers fl to The spacer buttonsare carried by and normally held. in elevated positions by spring arms52 which connect them to the spacing plate and serve to return them totheir nerf mal elevated positions after they have been lowered. for apurpose now to be stated. When either of the spacer buttons (with theexception of that bearing the character 8) is pressed dowmvardly and thespacing plate'is shifted transversely of the machine, the button is soplaced that it is caused to strike a stop pin 6 and thedepression 6provided for its particular engagement and by which the movement of thespacing plate is determined according to the particular spacer' buttondepressed. Inasmuch as the button bearing the character 8 mustnecessarily travel a greater distance than either of the otherdepiefssiblc buttons, when the spacing plate is shifted, I provide thedepression 6 in the base into which a pin. carried by the spring plateof said button is adapted to enter when depressed to restrict themovement ol the spacing plate required travel of is so great that wouldhave to be so positioned as to cause it to be struck by the next springplate in advance ot' the character "8 button and prevent/,the desiredmovement of' the spacin plate as required lwhen the' foremost of the twospring plates mentioned is depressed. The stop pins or depressions 6that correspend to the various lspacer buttons are so disposed that whenany. individual spacer button is depressed the movement of the spacingplate is caused to be such that the slpacing plate will actuate thelever 46 to' a f. egree that carried into juxtaposition with a rack bar29 that corresponds in number (counting from the units side .of themachine) to the number ol the spacer button operated upon. It will beseen that inasmuch as the springs return the spacer' buttons after theyhave lbeen dethe plate in such instance pressed, said buttons arenormally in a posi-.

tion to preventengagementwith any stop pin, except that which is to beengaged by a particular depressed button.

' While I have described the buttons as being loosely mounted anddepressible relative to the spacing plate, it is obviousthat the in thedesired degree. This is rendered necessary for the reason that the if astop-pin were used it` will cause the sweep arm 40 to be' integer 9button may be solidly mounted upon the plate and that insofar as thisbutton is concerned the travel of the spacing plate is restricted. whenthe leg ofthe spacing plate reaches the end of the slot'5 in which itrides.

53 designates the key board of the machine which is provided with frontand rear down'- Wardly extending ilanges 54. This key board is supportedby a pair of rearwardly extending arms 55 which are rockingly fitted toposts 56 and are adapted to move vertically, the arms extendingforwardly from saiddposts to receive said key board and rearwarY y intojuxtaposition with the item wheel and type wheel carriage.` A

.57 are posts surmounting the -base of the machine immediately in frontof the carriage l just referred to and in which are vertical guidewaysl58. 59 is a vertically movable slide bar. that extends transversely ol/the machine and is adapted to ride in said gnide-4 Ways, the said slidebar being provide with a longitudinal slot 60 (see Figs. IV, XII andXIV). The key board arms 55 arelv loosely fitted to the slide bar 59through the medium of stems 6l located in their rear ends, as seen inFig. XI, whereby said slide bar is raised and lowered during themovement of the key board and its-arms. l f

62 is a litt sleeve or member'loosely fitted to the slide Abar 59 androvided with an aperture 63 through` whic a stem 40 carried by the sweeparm 40 at its rear end passes, as seen in Figs. IV and XII. The liftsleeve is preferably held to the slide bar by tongues 64 that embracethe bar. The sleeve is pro? vided with a rearwardly extending finger 65which is ada ted. te enga' e either of the rack bars 29 to W ich it mayle moved by entering the notcl1`37 therein, and upon the iinger is a Wing66 Which is adapted to engage against the edge ol the rack bar 4for thepurpose of preventing escape of said finger until the rack bar has beenactuated.

67 is a cross bar attached to the key board arms 55. Thecross bar hasmounted upon it'a lurality of stop pins 68 which are vrefcrabl ytaperedat 69. (See Figs. XII, XV, XVI, XVII, and`-XVIII).

70 designates a latch pivoted. at 71 to the swcep arm 4Q and looselyembracing the .rear ent of cause 1t to engage the teeth oi the ratchetbar 38 when the rear end of the sweep arm is in lowered Y osition andthe key board is at rest, and allso to engage `the stop pins 68 carriedby the cross bar,A 67 when the key board is depressed and the crossbaris elevated.

74 designates of these keys is provided with a stem 75 (see Figs. II,III, IV and V I) loosely seated in the top of the key board. and lsaidstems are guided beneath the top of the key board in rIV, l

said sweep arm. m a position that will Figs. IV and VI) which etreseloops 76 (see front and rear flanges of said cured to the board.

77 are rockeble legs extending transversely of the key board and pivotedto its front and rear flanges adjacent to the key stems 75. These legsare provided with late/ral pins 78 tlmtseat in the key stems and areadapted to be actuated during the downward movement' of each key vstemfor the purpose of imparting s rocking motion to j The rockeble legserecontrolled the leg. by return springs 79 which ere attached to thekeyboard end beer against the pins 7S. .-80 (see Figs..4 Il, III 'zi-ndIV) are posts surn mounting the base of the machine beneath thekey board53. These posts are provided with stop studs 81, of s. numbercorresponding to the number of rockeble legs and which are plsced n ponthe posts'et various degrees of elevation 1n order that the dril'erentrocksble legs may be required to travel Adiflerent distancesbeforefengsging seid stop studs,

The object of this'is to provide for the key board .being depressed veryVslightly when either the"0 sign key or the integer 1. key 1s operatedupon,'n.nd vgraduallyincreasing distances m operating upon the remiuningke vs.v Bythis means I provide for the slide ber 5 9 ,being elevated tothe properv distance inesch instance to raise'the rsek ber29-'corresponding to any pertieul-.ir key, so that sa.i l rack'bsrwillfinove the correspondingitem wheeland corresponding t ype 'wheelto sdegree identical with the degree of'niovement' of the rack bar.

vsdding# notion the spacing plate is first itemv to :be ,added Duringthe operation of the mfichine for moved tot-he necessary degree in the'manner previously, exp ined, in-order'thst the sweep srm msyv becarried to the proper'rsek ber according to the highest denomination ofthe The figures, of lthe item src then secured upon the item wheels 23lend the type wheels 2d by operating the proper keys which cause thekeyyboard to be depressed, the rear ends-of the key board larms to'beelevated mdeerry the vertically '66 of the lift sleeve. finger (inovesint'o ene. I

movableslideberf?) therewith. The slide bar elevetes the lift sleeve 62with'it and ss-id sleeve sets upon therick bers through the 1' gagernentwithfthlA Jidj'scent rack vber 29 -action of the sweep ernr controllingspring es 45.A Asthereer .ends of: the key board arms' l l l which saidfirms are guided.

"end the vertically Imovable slide bar fitted thereto descend afterelevating s particular rack bar., seid slide bar carries with it thelift sleeve While the elevated rack bnr is maintained in its upliftedposition b y means to be presently described, and immediately upon thewing of the lift sleeve inger becoxmng disengaged from the eleveted'rsckbnr the sweep arm and latch are carried by their controlling spring in adirect( toward the unit side of the machine unti the latch enga. es thenext stoppin in rontzofit (as seen in g. XVII) and its forward movementis re stricted. Then as the rear ends of: the key bosrd arms and thecross bar 68 descend to the ratchet ber 38, the latch strikes u on atooth of seid 'v'.r, (es seen in'` Fig. X III).

whereby it is withdrawn from the stop pin just engaged, while thestop-pin carrylng cross barcontinues to .descend andthe Alatch movesinto enga ement with, the next succeeding tooth o? said' ratchet. bersare heldin elevated positions after they have been actuated in the'mannerdescribed to operate the item and type wheels, by trigger arms S2(see Figs. VI, XI, and X11) The rack which ere provided with fingers 83that engage lthe ratchet teeth 32 of the rack bars.

.ws-rd movement by n. stop ber 84 attached to :rframe185 having eslotted topmember in arms are pivoted at 86 to the frame 85.

87 are springs which bear against the trig ger' arms and hold theirupper ends in forward positions. Each trigger bar is providedat'itslower end with a rearwardly ex- '.tending heel88.

' During the forward movement of the carringe kwith the series of itemwheels the series of ty wheels and the drop or gravitative.

iiers, the ratchet teethof the rack bars :ire withdrmvn from theengaging trigger armi .iingers'SS 4and as a' consequence the rack bars-s'tre'free to drop or'deseend by gravity while rack their teethare inengagementwith pins '148 of ccuniulator wheels 147 hereinaftgjdescribedl]` The result is the accumiator wheels 147 are rotated todegrees corresponding to thedegrees to whichy the rack bars' wereelevatec'lend that accumulation'is made The trigger The trigger arms arerestricted in their for-A l '95 thereon according to the items that werepreviously` present upon'the iteml wheels and the type wheels. ment'ofthe` carriage with the rack-bars the item wheels andtype wheels arereturned to 1 their normnl positions 'and are p roperly placed to beagain operated as before-in ad ing additional items 89 designates a'pairof standards mounted upon the rear portion of the base of the mal chine.(see F1g. XVI) against wlii'ch it is held by the lDuring the downwardmovel y 90 is e pa r reel journaled to the frame85 i' and adapte tocontain. a ribbon of pa er 'on which the items of addition are printe from iso the type wheels 20. The reel is controlled in its rotation by aspring brake 91 that is attached to one of the standards `89 and bearsagainst one end ol" the reel, as seen in Fig. I1, the desired tensionupon the spring brake be ing secured by an adjustment screw 92.

93 are posts surmount'ing the standards 89.

94 are paper feed rollers having shafts journaled inthe posts 93 towhich the paper is dclivered from the reel 90. In passing to the rollersthe ribbon of paper travels in a course in juxtaposition to the typewheels 26.

95 designates a plurality oi roller platens that are arranged inopposition to the type vwheels 26 and by which the ribbon of paper iscarried to the characters on said type wheels for the purpose of causingimpressions to be made on the paper by the type. The roller platens arecarried by slide bars96 ex tending longitudinally of the machine (seeFigs. 1V, X11 and X111). The slide bars are mounted in a frame supportedby the stand ards 89 and having a forward slotted wall 97 and a rearslotted Wall 9S in which the barsv operate, the slots in the forwardwall being of greater height than the slots in the rear wall, in orderthat the platen carrying bars may be held in inclined ypositions withtheir front ends highest. The slots in the forward wall 9? are of asuiicientvertical .length to permit of an upward movement of the platencarrying;r bars when they are pressed forward 1n the manner to-bepresently explalned, m order that the roller platens will rotate againstthev face of the type of the typewheels while performing the printingaction, and thereby produce a more perfect impression upon the paper,due to a more `gradual printing than could be secured by a directforward pressure against the type. The rearward movement of the platencarrying bars is restricted by stop pins 09 that are seated in said barsand are adapted to engage the forward.. frame wali 97. y

100 are the end walls oi the platen carrying bar frame and 101 is across rod mounted in these end walls.

10i?J are springP 1l ngers that extend over the roller platen bars andterminate in juxtaposition to the upper edges of said bars as seen inrFig. X11. These springs are ada ted to resist the upward 1.. lvement ci'sai" oars m a yielding manner, 1`n vorder that the roller ,platens maybe held iirnily, yet yieldingly,

against the type of the type wheels during their rising movement inprinting action.

103 (.lesignates a bumper frame pivotcd at 11ME to the standards 80 andhaving a slotted cross head 105 atv its outer end. This bumper frame isadapted to be elevated to the rear side of the frame in which the platenbars are located and the slots in its cross-head are of sullicientdimensions to ermit of the rear projecting ends of saidp platen carryingbars passing through .(see Figs. 1V and V).

this lever is providedwith a stem 11.7

them except when said slots are guarded in the manner to be hereinafterexplained.

106 is a rear guide strip secured to the cross head of the bumper frame.

107, areforward guide strips (see Figs, 1V and XI) that are secured tothe arms of the bum er frame, f

108 are umper slides which corres'ond in number to the number of rollerp aten bars and. which are loosely positioned between the guide strips107 and 'the bumper frame ,cross headl 105 and guide stri; 106 toV beguided thereby during their s icing movement. These bumper slides are 'l1rovded with stop pins 109 and 110 (see "ig, ted to strike respectivelyagainst one of tie Guide strips 107' and against the bumper rame crosshead 105 1 to restrict the movement of they slides. The 'bumper slidesare adapted to be moved rearwardly by means to be hereinafter described,for the purpose of causing their rear, ends to close the slots in thebumper frame cross head in order that said slides will strike againstany desired number of the roller platen bars '96 when .the bumper frameis elevated into a vertical position.

`111 is a. brakebar pivoted to the bumpery frame and extending acrossthe bum er slides, the said brake bar being prefere ly n provided at itsrear side with a rubber or' other facing strip 112 which by bearing.against the bumper slides will create sullin cient friction between saidparts to prevent retrograde movement of the bumper slides in a orwarddirection while they are being,`

elevated with the` bumper frame to strike.

the platen bars.

1.13 is a cam that is' arranged immediately in front of the bumpermechanism of the machine and which is provided `with a leg 114 thatoperates in the slot 7 of the base 1, as seenin Figs. 1V, V, XI and XII.This cam is adapted to be moved transversely of the base of the .machinefor the purpose of causing it to engage against the vinner ends. of thebumper' slides 108 and throw them rearwardly to close the slots in thebumper frame cross head in the manner stated. 115 isa lever pivoted at116 to the baserof the machiney The .rear arm of will in turn impartmovement to the cam 113 for the purpose ofA moving a number of thebumper slides 108 vrearwardly to close the ythe lever 115 will beactuated thereby and I slotsin the bumper frame cross head and that thenumber of bumper slides so moved depends upon the degree of movement ofthe spacing plate.

119 designates a pull rod by which the bumper frame 103 is elevated.rlhis puli rod has a bifureated rear end 129 (see Fig. XI).which-straddles leg of a standard S9 by which said bar is guided. Onearm of the bifurcated end of .the rod 119 is provided with a notch 121which provides a shoulder in said arm. The shoulder is adapted to engagea stud 122 "ojecting from the adjacent side of the bumper frame (seeFig. XI) so that when the pull rod is 'moved forwardly the bumper framewill be elevated to a vertical position for the purpose of carrying thebumper slides that have been moved rear- Wardly into impact with theprojecting rear ends of the roller platen bars 9G.

123, is a lever pivoted to a post 124 mounted. on the base of themachine at the right hand side thereof. This lever is piyotallyconnected at .125 to the pull rod 119. When the lever is movedrearwardly the notch 121 of the pull rod receives the stud 122, and whenthev lever is moved forwardly the shoulder at the rear end of said notchengagessaid stud for the purpose of lifting the bumper frame, and as thebumper frame reaches the limit of its upward .movement and strikes the'frame wall 9S a jar is occasioned, due to which the pull rod is shakenfrom the stud 122, thereby permitting the bumper frame to immediatelyresumo its normal lowered position. The lever 123 is provided with apair of studs 126 (more particularly referred to hereinafter) located atits inner side (see Fig. I and dotted lines Figs. IH and IV).

127 is an ink ribbori s ool mounted on a bracket 12S located at tlicopposite side of frame actuating mechanism is located. This spoolis'provided with a knob 129 by which it may be rotated on a stemsupported by said bracket and the spool has connected to it one end ofan ink ribbon 130. The ink ribbon extends transversely of the machine`between the type wheels 26 and the roller platens 95 and immediately infront of the ribbon of pa. er delivered from the reel 9() to the feedrol ers 94, the ribbon being directed in its travel by guido stems orrollers 131v (see Fig. I). rlhe ink ribbon leads to a. spool 132 whichis provided with slot and pin connection with a vertical shaft 133 thatis loosely mounted in a bracket 134. flhe shaft 133 has fixed to it aratchet wheel v135 (see lfig. Hl, VI and XX).

136 is a l ard adjacent to the pull rod 119 and with which pull rod saidlever has slot and pin .connection at 13S (see Fig. H1).

the machine from that at which the bumper lever pivoted at 137 to thestand- 139 is a pawl pivoted to the upper arm of the lever 13o andadapted to engage the ratchet wheel 135 of the shaft 133 which carriesthe ribbon spool 132, whereby upon each rearward movement of said pullrod, rotation is imparted to the ribbon spool shaft to wind the inkribbon thereon.

14() is a spring restraining arm attached to the bracket that supportsthe ink ribbon spool 132, and which by engaging with the lratchet wheel135 serves to prevent retrograde rotation of said spool. '.lho upperpaper feed roller 94 is provided with a feed wheel 111 and the lowerpaper feed roller is provided with a feed wheel 142, these wheels beingarranged in mesh with eachother.

143 is a spring controlled pawl carried by the upper arm of the lever1.315 and arranged to engage the teeth of the feed wheel 142, the pawlbeing so applied to the lever that it will move freely beneath said feedwheel when the upper arm of the lever is moved rearwardly and berestrained from swinging motion when said lever arm is again movedforwardly, whereby the pawl is caused to oper-f ate said feed wheel torotate the feed rollers for paper feeding action.

144is a spring stop arm which engages the upper feed wheel 14.1 torestrain the feed rollers from retrograde rotation.

145 is a knob fixed to the shaft of the lower fe'ed roller 94 and bywhich the feed rollers may be rotated in introducing the ribbon of paperbetween them.

146 designates a shaft mounted in the posts '57 and extendingtransversely across the machine in front of the carriage which carriesthe item wheels 23, the type wheels 26, and drop or gravitative bars 29.

1:17 are accumulator wheels loosely mounted on said shaft and eachbearing the integers 1 to 9" and the 9 sign. At one side of cach ofthese accumulator wheels is a plurality of pins 14S corresponding innumber to the number of characters on tht` wheel and at the oppositeside of each wheel is a. trip pin 149. rlhe pins 14S areadapted to beengaged by the front teeth 30 of the rack bars 2 9 which are normallyout of engagement with said pins during the act of elevating the rackbars to operate thi` item wheels and type wheels of the machine.

150 is a guard bar located in front of the accumulator wheels andprovided with guard wins 151 adaited to normall occu i r iosil l tionsbetween adjacent pairs of the pins 1118 of the accumulator wheels forthe purpose of preventing accidental rotation of said wheels. The guardbar is provided at its ends with bifurcated arms 152 which straddle theshaft 146 on which the accumulator wheels are mounted and which extendinto engagement with the carriage side bars 11 (scc Fig. X111). Theguard har is normally held in retracted position by springs 153 that areattached. to the posts 57 and bear against the arms of the bar, as seenin Fig. XII.

154 designates a rock shaft journaled in the posts 56 (see Figs. l andlV) and to the ends of which are fixed crank arms 155.

156 are links having their 'Forward ends vpivoted to said crank arms andtheir rear ends pivoted to the carriage side bars 11 by pivot pins 157.

158 are links connected to the links V56 and to the upper )ortions ofthe carriage side bars. These linlzs 156 and 158 serve to draw the itemwheel and t pe Wheel carriage 15 forwardly when the rock sli and rockingmotion is imparted to said rock shaft through the medium of the lever123, after the bumper of the printing mechanism hasbeen actuated by themovement of said lever and the actuation of the rock shaft isaccomplished, through the medium of the rearmost stud 126 carried bysaid lever striking against the ivot in adjacent thereto that connects-t ie adiacent link 156 and crank arm 155. When. the lever 123 is movedin the opposite directi Jn the forward stud 126 strikes against saidpivot pin and returns the item wheel and type wheel oar-- riage to itsformer position and away from the accumulator wheels toward which it waspreviously moved. i

' It is'to be understood that when the item wheel and type wheelcarriage is moved for- L' wardly rthe rack bars `29 have been previouslyelevated to operate the item wheels and ty e wheels and that they areheld in their e evated ositions. As the carriage moves forward y itsside bars 11 press against the arms of the guard bar 150, there- 40byforcing said guard bar forwardly and withdrawingr the guard pins 151from positions between the pins 148 of the accumulator wheels* At thesame time the forward rack teeth 30 of the rack bars engage the pins 1484.5 of the released accumulator wheels.

i 159 designates a rocker frame that is located between the standards 89and is provided with forwardly projecting lingers 160, which enterbetween the item wheel and type wheel carriage posts 17 and are adaptedto operate against members carried by these posts. The arms of therocker frame are )ivoted at 161 to the standards 89 and the lower endsof these arms have connected to 5'5 them hooks or links 162 which engagethe pivot pins 157 by which the links 156 are connected to the carriagesidebars 11. Upon each forward movement of the links 156 the hooks 162are drawn forwardly and the upper end oi the rocker traine with its'lingers is moved rearwardly and away from the guide posts of the wheelcarriage. Y,

163 are dogs which are pivoted to the guide'posts 17. (See Figs. XH andXlll). These dogs :have forwardly extending fingers aft 154 is rocked,

164 that normally project into the path of travel of the trip pins 149carried by the accumulator wheels 147. The dogs also have upwardlyprojecting arms 165 and rearwardly projecting arms 166 which are in 70clined at their rear edges. 167 are pawls also pivotedto theguide postsand having upper arms 168 provided. with shoulders 169 that are adaptedto receive the upper arms of the dogs 163. The pawls also .havedownwardly extending arms 17 0 which are adapted .to ride against theinclined rear edges of the rear arms of the dogs 163. The dogs 163 andpawls 167 are normally maintained in the positions illustrated in Figs.XH and XIII, and the rack bars 29 are normally upheld y one step/fromthe limit of their downward movement, when in Alowered positions, due

to the rollers y.34 carried by the rack bars resting upon the upper endsof the pawls 167. I thus provide for the descent of the rack bars anadditional step when they are released will be presently stated, inorder that transfer may be made from an'accum .later wheel of a lowerdenominationto ap' 9G accumulator wheel of a higher denomination. Eachtime that transfer is made the trip pin 149 of the accumulator wheel oflower denomination strikes against the linger 164 of the adjacent dog163, thereby tripping said 95 dog so that its linger niovesdownwar'dlyand its upwardly extending arm moves forwardly to release the pawl 167associated with said dog. These movements take place while the itemwheel and type wheel car- "iage is in forward position, and as aconsequence ot' the forward .movement of the upper end oi' the pawl 167the rack bar which is in engagement with the accumulator wheel of higherdenomination and to which transfer is to be made is permitted to descenda single step to the limit oi-` its movement, thereby n'ioving theaccumulator wheel ot higher denomiuation a single step and performingthe carrying operation from 'the 110 lower denomination wheel to thehigher denomination whecl. Willen the item wheel and type wheel carriageis returned to its normal position the lower arm of the pawl 167isengaged by the opposing finger 115 16() Aof the rocker frame 359 andsaid finger' acts to return the pawl to itsfnorrnal position7 due tosaid pawl arm riding into engagement with theirs-lined rear edge or thedog arm and acting tothrow said arm 120 downwardly, the dog 'linger 164upwardly into the path ol travel et the corresponding trip pin and theupper arm '165,into engagement 1with the shoulder 169 ol the pawl 67.125

.it now being understood how, when cach item is placed into the item andtypewheels upontthe upward movement oi the rack bar 29 and how theprinting upon tl'iestrip ol' paper is eliected while said wheels are in139 ies B Y v such position, how upon the vforward movement of thecarriage carrying said. wheels and rackbars causes the engagement of thelatter with the accumulator' wheels, and how upon the release anddownward movement of said rack bars all of the item and strip of paper,under the items previously printed thereupon, the spacer button 51 ofthe spacing plate 47 corresponding to the highest digit used in thetotal is depressed and the spacer' plate is moved as far as it ispermitted to go, after which the total is copied from the accumulatorwheels by pressing `the proper key board keys '74, whereupon it will beseen that both the item and type wheels have the same figures (thetotal) as the accumulator' wheels and upon the manipulation o1 the lever123 the printing of the same will be effected in like manner as thcprinting of any itemA heretofore printed. For example, if the totalexhibited on the accumulator wheels was 1,234,

the type and item wheels being at zero, the spacer button of the fourthdigit is depressed and the spacer bar is moved to its limit of movement,after which the key board keys 74 are depressed in 1---2--25---4 order,whereby the number 1,234 will be placed in the item and type wheels andafterwards printed as before described. l l

l For the purposeolf rel/casing the guard bar pins 151 from the pins ofthe accumulator wheels 147 in order that said wheels may be returned toclearing position, I employ the following parts: 172 is a rock barmounted in the posts 57 and provided with arms 173 which are adapted toengage the guard bar 150. l`he rock bar is provided with a knob 174 b vwhich it may be grasped to rock it and throw the arms 173 against theguard bar. ln restoring the laccumulator wheels the shaft 146 on whichthey are mounted is rotated through the medium of knob 6175 fixed tosaid shalt in the opposite direction to whiclrthe wheelsinove whenaccumulating, until the trip pins 141) on all of the wheels save the oneoi' the highest order contact with the linger 164 o1' the dogs 163,whereupon all ol" said mentioned wheels are brought to astop and exhibitthrough a sight opening in a suitable casing not shown, a cipher. Asthere is no dog 163, hence no `carried linger 164, for cooperation withthe trip pin 14) ol.i the accumnlator wheel o'l' the highest order, toell'eet a stop therefor I employ a rearwardly and. upwardly extendinglinger 173"l secured to the rock shalt 172 which, when' said rock shaft.is rocked in theproper direction will elevate said finger 17 3a into thepath of travel of the trip pin 149 and when the shaft 146 is properlyrotated the accumulator wheel of the highest order will be brought toproper position in like manner as the accumulator wheels beforedescribed, due to the contact of said trip pin with said linger 1731.

In soine instances it is desirable to. carry on the operation of anadding machinewithout the printing action, and to provide for this beingdone in my machine I employ the following parts. bracket 177 attached tothe base ofthe machine (see Figs. IV and V) and extending through theslot 4in the front ilange 2..

The rear end of this lever is held depressed by a spring 178 and thelever is connected 176 is a lever pivoted to a by a link 17 9 to an arm180 carried by the y rock shaft 154. When the lever 176 is depressed thcrock shaft is operated and the wheel carriage and parts associatedtherewith are operated in a manner similar to that in which they areoperated by the lever 123 and without the printing action accomplishedthrough the medium of the lever 123 being carried out.

It sometimes occurs that mistakes are made in the operation of the itemwheels and it is therefore desirable to provide means whereby the itemWheels may be returned after they are operated and before the printingmechanism and the accumulator mechanism are brought into4 action. Toprovide for the release of the rack bars and the return of the itemWheels and type wheels to their cleared positions, I make use of thefollowing parts: 181 is a lever pivoted to a bracket 182 attached to thebase of the machine, (See dotted lines in Fig. II and yfull lines inFigs. Vand XII.) This lever extends through the slot 3 in the baseflange 2 and its rear end is normally held depressed by a spring 183.the rear end, of tically through the base of the machine at its rearend. 185 is a rock bar journaledjn the l" rame and projecting over theh'eelslSS of the trigger arms S2. This rock barlias fixed to it an arm186 which occupies a position over the lift pin 184 and which is adaptedto be lifted by said pin'for the purpose of rocking the rock bar andwithdrawing the fincfers of the trigger arms from the ratchet teeth ol"the rack bars 29. It will be seen that by this means 'all of the rackbars that have been elevated may be lowered without affectingto bcseparately placed in the item and type.

184 is a lift pin pivoted to said lever' and extending verturbed. lThisoperation,

the type wheels actuated by lmovable relative to would,

Wheels, andas the accumulator Wheels them,

were no means employed toprevent add tlns total said rack bars 29, lemploy a guard bar 187 which is slid ably mounted in the l'orward end ofthe base of the machine and in juxtaposition to the lever 176, (seeFigs. lV, V, and XXl) which bar 187 is provided with a ledge E88 which,when said bar 187 is moved in the proper direction, Will cause saidledge lSS to be carried under the lever 176, rendering the sameinoperative. The guard bar 187 is shifted longitudinallj by a push pin189 havving a beveled lower end winch engages a beveled portion of the'guard bar as seen in Fig. XQ..

By rendering the lever 176 inoperativethe carriage. carrying the itemand type Wheels cannot belnought to a forward position, couseducntly therack bar carried thereby ixill not .mesh y with the accumulator wheels,hence itA will be seen that the racl; bars on their downward movement.Will leave the total in said accumulator Wheels undishowever, does notin the least prevent the operating of the handle L23 and the printingeffected thereby. i90 designates a pin (see Figs. lV and XII)stationarily mounted in the shaft 27 of and is located between thesecond and third digit wheels thereof. This pin i9@ is ci suiiicientlength to cause the ink ribbon andv aper to be impinged between it andone oi t ie platenrollers when the latter is drawn iorn'fardly in theact ci printing and producing upon said Taper a decimal point.

l claim:

, l. ln an adding machine, the combination. of a series ot accumulatorWheels, a carriave movable relative to said accumulator Wheels,gravitative means and item Wheels carried by said carriage, and meanstor elevating said gravitative means the item wheels being actuated 'bythe upward movement of said gravitative means, and the accumulatorWheels, and item Wheels, being actuated by the dropping of thegravitative means when the carriage is advanced.

2. in an adding machine, the combinatmn movable relative to saidaccumulator wheels,

" gravitative rack-bars and item wheels carried bj said carriage; ingsaid gravitativei Wheels being actuated ment of said gravitativeraclobars, and the accumulator wheels, and item Wheels, being thedropping of the gravita-tive raciti-bars when the carriage is advanced.

3., ln an adding machine, the combination of a series oi accumulatorWheels, a carriage said Wheels, gravita-tive and means for elevatraclrbars, the item by the upward movein said item and ty pe Wheels toAthetotal already exhibited 1n the accumulator wheels upon the downwan.movement of' l,

rack bars carried by said carriage, means vfor elevating said rack bars,means for sustaining the rack ba'rs in elevated positionsyand means iormoving said carriage toward lsaid Wheels to bring said rack bars intoengagement with said wheels before the rack bars descend and cause therack bars to operate the Wheels while the racli bars are descending bygravity, substantially as set forth.

4. ln an adding machine, the combination 'of a series ol accumulatorWheels, means for' guarding said wheels against movement, a carriagemovable relative to said Wheels, gravitative rack bars carried by saidcar* riag'e, means for elevating said rack bars, means for sustainingthe rack bars in ele vated positions, and means for moving said carriagetoward said Wheels to bring said rack bars into engagement with saidwheels previous to their descent by gravity, substantially as setforth.

5. In an adding machine., the combination oi' a series of accumulatorWheels, a series of item Wheels, a' carriage by which said item v Wheelsare supported, rack bars carried by said carriage and arranged to engagesaid item Wheels, means for elevating said raclr` bars, means forsustaining the rack bars in elevated positions, and. means for movingsaid carriage toward said accumulator Wheels to bring said rack barsinto engagement With said accumulator Wheels, substantially as setforth.

6. in an adding machine, the combination of a series ot accumulatorWheels, a reciprocatory carriage, gravitative rack-bars and item Wheelsand type Wheels carried by said carriage, and means for elevating saidrack-- bars 5 the item Wheels and type Wheels beine actuated by theupward movement of sai V raclebars, and the item wheels, type Wheels andaccumulator Wheels being actuated by the dropping ot the rack-bars whenthe carriage is advanced.

7i ln an adding machine, the combination ol" a oi accumulator Wheels, areciprocatory carriage, gravitative rack-bars having ratchet teeth anditem Wheels 'and type Wheels carried by said carriage, means ,torelevating said rack-bars, and trigger arms ar ranged to engage theratchet teeth ot the said raclobars, the item wheels and type Wheelsbeing actuated by the upward movement of said rack-bars, and the itemwheels, type wheels and accumulator Wheels being actu i ated by thedropping of the rack-bars When the carriage is advanced and the ratchetteeth: released from the trigger arms.

In an adding machine, the combination of a series of accumulator Wheels,a recipro- 25 eatery carriage, gravitative recit-bars having ratchetteeth 'and item Wheels and 'type Wheels carried by the carriage, meansor4 elevating said rack bars, trigger arms are ranged to engage theratchet teeth of the' 13o rack-bars, and means for releasing therackbars; the item wheels and type wheels being actuated by the upwardmovement of said rack-bars, and the item wheels, type wheels andaccumulator wheels being actuated by the dropping of the rack-bars whenthe earriage is advanced and the ratchet teeth released from the triggerarms.

9. In an adding machine, the combination of a series of accumulatorwheels, means consisting of drop rack bars for operating said wheels, acarriage carrying said wheel oper ating means and movable relative tosaid wheels, and a guard bar for controlling the movement of said wheelsand arranged to be released upon the movement of said carriage,substantially as set forth.

10. In an adding machine, the combination of a series of accumulatorwheels, means consisting of drop rack bars for operating 'said wheels, acarriage by which said wheel operating means are carried, and which ismovable relative to said wheels, a spring controlled guard bar forengagement with said wheels, said guard bar being arranged in engagementwith said carriage, whereby the guard bar is moved upon the movement ofthe carriage, substantially as set forth.

1l. .ln an adding machine, the combination of a series of accumulatorwheels provided-with pins, a carriage movablel relative to said wheels,means consisting of drop rack bars carried by said carriage foroperating said wheels by engagement with their pins, and `a springcontrolled guard, bar adapted to b e engaged by said carriage and havingpins arranged to engage the pins of said wheels, substantially as setforth.

12. ln an adding machine, the comhination of a vertically movable keyboard, a key loosely mounted in said key board, a rockable member Iittedto said key board and having engagement with said key, and means adaptedto be engaged by said rockable. member to limit the downward movement ofsaid key board, substantially as set forth.

13. In an adding machine, the combination of a'vertically movable keyboard, a key loosely mounted in said key board, a spring controlledrockable member itted to said key board and having engagement with saidkey, and means adapted to be engaged by said rockable member to limitthe downward movement oll said ke) board, substantially as et forth. 4

i l. lu an adding machine, the combination ol' a vertically movable keyboard, a key loosely mounted inv said key board, a rockable memberprovided with a pin fitted to said key, and means adapted to be engagedby said rockable member to limit the down- ,ward movement oll said keyboard, substantially as setforth.

15. ln. an adding machine, the combination of a base, a verticallymovabld key board, a key loosely mounted in said key board, a rockablemember fitted to said key board and having engagement with said key, anda post mounted on said base and provided with a sto stud adapted to beengaged by said rockable member7 substantially as set forth.

16. In an adding machine, the combination of a base, a verticallymovable key board, a plurality of keys loosely mounted in said keyboard, a plurality of rockable members Iitted to said key board andhaving engagement with said keys, and a plurality of posts mounted onsaid base; said posts being provided with stop studs arranged atdifferent elevations thereon and adapted to be engaged by said rockablemembers to limit thc downward movement of said key board, substantiallyas set forth.

17. In an adding machine, the combination of a series of item wheels,means for engaging and operating said wheels, a shiftable member foroperating said wheel engaging means, a sweep arm for engagement withsaid shiftable member, a spring for moving said sweep arm laterally inone directiol;I and a spacing member for setting said sweep arm,substantially as set. forth.

1S. ln an adding machine, the combination of a series of item wheels,means 'for engaging and operating said wheels, a shiftable member foroperating said wheel engaging means, a sweep arm for engagement withsaid shiftable member, a spacing member for operating said. sweep arm,stop menhers, and means carried by said spacing member adapted to engagesaid stop members to limit the movement of said spacing member,substantially as set forth. v

1S). [n an adding machine, the combination of a series of item wheels,means for en'- gaging and operating said wheels, a shil'tahle member foroperating said wheel engaging means, a swinging sweep arm Aforengagement with said shil'table member and having an arm associatedtherewith and a spacing mem ber for operating said sweep arm through themedium of said associated arm, substantiall)T as set forth.

20. In an adding machine, the combination of a series of item wheels,means for engaging and operating said wheels, a shiftable n'iember foroperating said wheel engaging means, a sweep arm for engagement withsaid shiltahle member, a spacing plate for setting said sweep arm, and aspring for imparting lateral movement to said sweep arm, substantiallvas .set forth.

21. ln ali adding machine, the lcombination of a series of item wheels,means for engaging and operating said wheels, a lift member forengagement with said operating means, a sweep arm litted to said liftmember, a spacing member for setting said sweep arm, and a spring forimparting lateral move-

